下面程序的结果是 #include＜iostream．h＞ class test{ private： int num； public： test( )； int getint( ) {return num；} ～test( )；}； test：：test( ) { num=0；} test：：～test( ) { cout＜＜ Destructor is active ＜＜endl；} void main( ) { test x[3]； cout＜＜ Exiting main ＜＜endl；}
A．Exiting main Destructor is active Destructor is active Destructor is active
B．Exiting main Destructor is active Destructoris active
C．Exiting main Destructoris active
D．Exiting main